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Common Problems with Plastered Facades

This page belongs to the 'plastered masonry' umbrella. These walls (which have no insulation) are in fact a very practical base for installing greening technology, however, plaster facades are sensitive to lateral pressure and water when drilling, increased attention is therefore needed, particularly if using our 'Easy' design or if installing eyelet screws without thrust washers. Plaster coating of a thickness >2cm, especially for insulating coatings, profiling and large grains of sand are problematic. On this page we provide an overview of the difficulties that can be posed by this material and additional information is available on the following pages of the "Cleaning Masonry" section.

 

 

Concentrated Pressure

As the photo on the right shows, façade plaster is very sensitive to the installation of rawlplugs. The problem is mostly affected by loose or unsupported bolts, anchors etc. inserted into the wall. The thinner the shaft and greater distance at which it protrudes from the wall, the more concentrated the pressure will be on the bolt neck. Micro-cracks form and the plaster peels of around the hole.

 

 

Sealing against Moisture

Sealing is very important. While any water that gets into the drill holes during heavy rainfall will, eventually, evaporate, it is still highly advisable for you to seal all holes efficiently to minimise the risk of any moisture being present in the masonry. The sum of the intervals in which the wall is 'wet' is proportional tot he damage said moisture will do. As with roads in winter, it is during freezing that the presence of moisture does the most damage. 

 

Further Problems

Plaster coatings thicker than 2cm can be problematic, this case is therefor addressed separately in 'special plasters'. Plasters with a rough of grainy structure will often have to be sanded in the area you wish to install your anchors, bolts, etc. for optimum sealing. The masonry beneath the plaster layer may also be problematic, particularly certain types of brickwork or different types of timber. You can find out more under; ancient masonry.

 

 

Appropriate Construction Styles for Plastered Facades

Most of our kits with a bearing washer and a sealing ring are suitable, which will allow for cover over small cracks or damages that occur during drilling. If selecting from our Medium range, the "Classic" and "Premium" versions are preferable since they can be installed deeper and are therefor more stable than the "Eco" version. The Easy design is only suitable in special cases. Plastic rawlplugs combined with flanges provide better support for eyelet screws as they minimize movement, lateral pressure and avoid chipping, however this does not fully guard against moisture therefore, at least in representative walls, the "Simple" construction with its exposed rawlplugs, is unsuitable.

 

 

 

 

Various plugs in an old façade plaster
Ancient plaster, monastery/saxony
Redeveloped mixed masonry with bricks and sand-lime bricks before plastering
Mixed masonry
Wall trellis with wire, medium construction 'Classic' (covered hole)
Wall trellis with wire rope